WO2015162468A1 - Appareil et procédé de fabrication de boisson à l'aide d'une substance alimentaire en poudre contenue dans une capsule - Google Patents

Appareil et procédé de fabrication de boisson à l'aide d'une substance alimentaire en poudre contenue dans une capsule Download PDF

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Publication number
WO2015162468A1
WO2015162468A1 PCT/IB2014/067314 IB2014067314W WO2015162468A1 WO 2015162468 A1 WO2015162468 A1 WO 2015162468A1 IB 2014067314 W IB2014067314 W IB 2014067314W WO 2015162468 A1 WO2015162468 A1 WO 2015162468A1
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WO
WIPO (PCT)
Prior art keywords
capsule
extension
axis
bottom wall
beverage
Prior art date
Application number
PCT/IB2014/067314
Other languages
English (en)
Inventor
Sergio Zappella
Original Assignee
Caffitaly System S.P.A.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Caffitaly System S.P.A. filed Critical Caffitaly System S.P.A.
Publication of WO2015162468A1 publication Critical patent/WO2015162468A1/fr

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Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
    • A47J31/00—Apparatus for making beverages
    • A47J31/24—Coffee-making apparatus in which hot water is passed through the filter under pressure, i.e. in which the coffee grounds are extracted under pressure
    • A47J31/34—Coffee-making apparatus in which hot water is passed through the filter under pressure, i.e. in which the coffee grounds are extracted under pressure with hot water under liquid pressure
    • A47J31/36—Coffee-making apparatus in which hot water is passed through the filter under pressure, i.e. in which the coffee grounds are extracted under pressure with hot water under liquid pressure with mechanical pressure-producing means
    • A47J31/3666—Coffee-making apparatus in which hot water is passed through the filter under pressure, i.e. in which the coffee grounds are extracted under pressure with hot water under liquid pressure with mechanical pressure-producing means whereby the loading of the brewing chamber with the brewing material is performed by the user
    • A47J31/3676—Cartridges being employed
    • A47J31/369—Impermeable cartridges being employed
    • A47J31/3695—Cartridge perforating means for creating the hot water inlet

Definitions

  • This invention relates to an apparatus and a method for making a beverage using a powdered food substance contained in a capsule, in particular in a capsule equipped with a cup-shaped body made of a plastic material.
  • This invention is intended in particular for making coffee, so, for the sake of simplicity, the following description refers explicitly mainly to that beverage. However, this invention shall still be considered as being intended for making any beverage which can be obtained by passing hot water in a capsule containing a substance to be extracted or dissolved (normally grains or powder), according to the methods described below.
  • capsules for making coffee has been known for many years. They are usually capsules, which may have filters, through which hot water, under pressure if necessary, is injected, to extract the coffee from the powder or grains contained in the capsule. The outflow of the beverage is then guaranteed by an opening made through the second wall of the capsule.
  • a capsule containing a mixture of powdered coffee can be used to obtain a simple infusion by slowly percolating low pressure hot water through it, or the so-called “espresso" (that is to say, a beverage with significantly different organoleptic properties) if pressurised hot water is percolated through it.
  • the quality of the espresso may be further improved by forced pre-infusion before starting to supply the beverage from the capsule, then maintaining a predetermined pressure in the capsule during the entire supplying period.
  • the latter patent documents substantially describe four main methods for making coffee or beverages using disposable capsules: a first method in which the second wall of the capsule is pierced before water is injected into it; a second method making use of the inward opening of an openable portion of the bottom of the capsule; a third method in which the second wall of the capsule is pierced as a direct consequence of the increase in internal pressure due to injecting water into it, and a fourth, combined, method, in which the capsule is initially cut in such a way that the air and not the beverage can come out and in which the cut is subsequently enlarged as a result of the internal pressure, to also allow the beverage to come out.
  • the technical purpose of this invention is to provide an apparatus and a method for making a beverage using a powdered food substance contained in a capsule, which allow at the same time both suitable pre-infusion of the powdered substance in the capsule to be carried out, and a surface layer of thick, dense foam to be obtained in the resulting beverage.
  • the technical purpose specified and the aims indicated are substantially achieved by an apparatus and a method for making a beverage using a powdered food substance contained in a capsule as described in the appended claims.
  • FIG. 1 is a side axial section of an apparatus according to this invention in a first operating configuration
  • FIG. 2 shows an alternative embodiment of the apparatus of Figure 1 in a second operating configuration
  • FIG. 5 is an axonometric view of a piercing element of the apparatuses of the preceding figures.
  • FIG. 6 to 9 are axonometric views of four alternative embodiments of the piercing element of Figure 5.
  • Both the apparatus 1 and the method according to this invention relate to making beverages using a powdered food substance contained in a capsule 2 which, in turn, comprises a cup-shaped body 3 which is closed, advantageously fluid-tight, by a lid 4 (for example made of a plastic, aluminium or multi-layer film).
  • the cup-shaped body 3 comprises a bottom wall 5 which is made of a plastic material and is at least partly elastically flexible.
  • the bottom wall 5 may for example be constituted of a multilayer material (in the preferred embodiment comprising a polypropylene outer layer, a polypropylene inner layer and an intermediate layer made of EVOH), and have a thickness of between 0.25 mm and 0.40 mm.
  • the apparatus 1 comprises, first, an infusion unit 6 which in turn comprises a first part 7 and a second part 8 which are movable relative to one another between an operating position and a home position.
  • an infusion unit 6 which in turn comprises a first part 7 and a second part 8 which are movable relative to one another between an operating position and a home position.
  • the first part 7 and the second part 8 are coupled and between them form an extraction chamber 9 in which the capsule 2 from which the beverage will be obtained can be enclosed.
  • the first part 7 and the second part 8 are at a distance from one another and, in use, allow the capsule 2 to be inserted in and removed from the extraction chamber 9.
  • the chamber is practically entirely formed by the first part 7 which is also slidably movable relative to the second part 8 driven by a system comprising a connecting rod 10 and crank 11 which, in the known way, can be operated either by a motor or by a manual operating lever (which are not illustrated).
  • the second part 8 is stationary and, in the operating position, substantially acts and a closing/sealing element for the extraction chamber 9.
  • the infusion unit 6 is a unit of the horizontal type, that is to say, a unit in which the first part 7 and the second part 8 move one relative to the other along a line of sliding which, at least in use, is substantially horizontal, and in which, in the known way, therefore not described in detail, the capsule 2 is inserted and removed by means of gravity.
  • retaining means are designed to hold the capsule 2 to be used in an intermediate position between the first part 7 and the second part 8 when they are in the home position ( Figure 1 ), whilst ejection means (also of the known type and therefore not illustrated) are designed to remove the capsule 2 from the extraction chamber 9 when the first part 7 and the second part 8 are moved from the operating position to the home positon.
  • Hot water feeding means 12 are associated with the extraction chamber 9 for, in use, injecting hot water into the capsule 2 enclosed in the extraction chamber 9, through at least one injection opening 13 made at or close to the lid 4, and first piercing means 14, described in detail below, are associated with the extraction chamber 9 to in use create at least one outfeed opening 15 through the bottom wall 5 of the cup-shaped body 3.
  • the feeding means 12 comprise second piercing means 16 associated with the extraction chamber 9 for in use creating the injection opening 13 through the lid 4 of the capsule 2, in other embodiments it may even be the case either that the capsule 2 is already provided with the injection opening 13, or said opening is created before the capsule 2 is inserted in the infusion unit 6.
  • beverage collecting means 17 associated with the extraction chamber 9 for in use collecting a beverage which, through the outfeed opening 15, comes out of the capsule 2 enclosed in the extraction chamber 9.
  • the collecting means 17 are constituted of a plurality of channels/ducts which guide the flow of the beverage from the outfeed opening 15 to a supplying nozzle of the apparatus 1 (the nozzle and part of the ducts are not illustrated in the accompanying drawings).
  • the first piercing means 14 comprise at least a piercing element 18 extending from its own base 19 to at least its own top edge 20, along an axis of extension.
  • the base 19 is mounted on either the first part 7 or the second part 8, whilst the top edge 20 is free and is facing towards the inside of the extraction chamber 9.
  • the top edge 20 comprises a cutting edge 21 extending transversally to the axis of extension and designed, in use, to make the outfeed opening 15 by making in the bottom wall 5 of the capsule 2 a linear cut 22 extending between two ends which are separate and apart (that is to say, the cut is not closed on itself, so as to avoid causing the complete detachment of any piece of the bottom wall 5).
  • the piercing element 18 comprises an operating portion 23 extending from the top edge 20 towards the base 19, at least for part of the overall length of the piercing element 18, and which forms a flow channel 24.
  • the latter in turn extends, from the top edge 20 and at the cutting edge 21 , parallel to the axis of extension.
  • the definition provided also covers the case of the presence of any complex channels which have a first stretch (starting from the cutting edge 21 ) that is straight and subsequent stretches which are not aligned with the first (therefore curved, angled, moved, etc.): in that case the flow channel 24 will be constituted only of the first stretch of the complex channel.
  • the flow channel 24 comprises a concave inner surface 25 (which in other words may also be considered as the set of the sides and the bottom of the channel) which, starting from the top edge 20 and at the cutting edge 21 , extends substantially parallel to the axis of extension.
  • the concave inner surface 25 is shaped in such a way that all of the projections on a reference plane, which are made parallel to the axis of extension, of the cross-sections of the concave inner surface 25 created in planes perpendicular to the axis of extension, substantially lie on the same line.
  • the cutting edge 21 is shaped and/or positioned in such a way that its projection on the reference plane, parallel to the axis of extension, substantially coincides with, or is alongside and substantially parallel to, the line on which said projections of the cross-sections of the concave inner surface 25 fall.
  • the cutting edge 21 is advantageously designed to make in the bottom wall 5 of the capsule 2 a linear cut 22 which also substantially has the same shape as the line on which all of said projections of the concavities fall.
  • Figures 5 to 9 show various possible embodiments of the piercing element 18.
  • the piercing element 18 advantageously comprises a tubular base 19.
  • the operating portion 23 is directly fixed to the base 19, whilst in the case in Figures 6 to 9 an intermediate portion 26 is interposed between the two.
  • the distinguishing feature for identifying whether there is an "intermediate portion 26" (as in Figures 6 to 9) or not (as in Figure 5) is the shape of the cross-section of the concave inner surface 25.
  • the operating portion 23 has a thickness (perpendicularly to the axis of extension) decreasing towards the top edge 20.
  • the thickness gradually decreases to nothing at the cutting edge 21 which therefore has a wedge-shaped cross-section (depending on requirements it may or may not be sharp like a blade).
  • the thickness of the operating portion 23 advantageously increases thanks to an outline of it which gradually increases outwards relative to the axis of extension.
  • the concave inner surface 25 extends on a half-cylinder, in the other embodiments it is constituted of a plurality of flat faces which are parallel to the axis of extension and set at angles to one another. In any case, other combinations may also be adopted.
  • the line on which all of said projections of the cross-sections of the concave inner surface 25 parallel to the axis of extension lie may be a curved line and/or a broken line.
  • the line on which all of the projections lie has, overall, depending on the point of view and the actual sizing of the various parts, a C, U, L or V shape.
  • other, more complex shapes for example M or S
  • the line on which all of the projections lie may take any shape, in the embodiments illustrated it has what may be termed an "open" shape. That is to say, it is shaped in such a way that it does not tend to close on itself. In other words, the distance between two non-adjacent points of it is always greater than the distance between all of the points of the line which are between the first two.
  • the top edge 20 and the cutting edge 21 substantially coincide and extend equally, in other embodiments it may be the case that the cutting edge 21 is shorter than the top edge 20.
  • the concave inner surface 25 must be understood to be only that "subtended” only by the cutting edge 21 (with reference to the line of projection parallel to the axis of extension).
  • this invention also covers any piercing elements in which the operating portion 23 is constituted of a tubular body one end of which constitutes the top edge 20 but in which only part of the end is shaped in such a way as to form a cutting edge 21 (for example, it is sharp).
  • the concave inner surface is only that part of the surface of the axially tubular body passed through by all of the planes radial relative to the axis of extension which intersect the cutting edge.
  • the flow channel 24 has a length greater than or equal to its own maximum width (measured between the two points of its cross-section perpendicular to the axis of extension, which are the furthest from each other).
  • the top edge 20 extends in a plane perpendicular to the axis of extension.
  • the top edge 20 may also comprise a component of extension along the axis of extension (for example it may have a pointed shape).
  • the piercing element 18 is stationary relative to the part on which it is mounted, either the first part 7 or the second part 8, and is positioned relative to the extraction chamber 9 in such a way as to create the linear cut 22, which constitutes the outfeed opening 15, either when the first part 7 and the second part 8 are brought into the operating position or only after a subsequent swelling of the capsule 2 caused by the water injected into it, or partly when the first part 7 and the second part 8 are brought into the operating position and the remainder following the subsequent swelling of the capsule 2.
  • the piercing element 18 is also positioned in such a way that, in use, the flow channel 24 has its concavity at least partly facing upwards. That is true in particular in the case illustrated in Figures 2 to 4 whose infusion unit 6 is, as already indicated, of the horizontal type and in which the concavity is in use facing vertically upwards. In contrast, that is not true in the case in Figure 1 , where the piercing element 18 is positioned with the concavity facing towards the observer.
  • the flow channel 24 is also part of the collecting means 17.
  • those of this invention also comprise the operating steps of making at least one outfeed opening 15 through the bottom wall 5 of the cup-shaped body 3, injecting hot water into the capsule 2 through the injection opening 13 to obtain a beverage by means of the interaction between the hot water and the powdered food substance, and making the beverage obtained in this way come out of the capsule 2 through the outfeed opening 15.
  • the injecting step may also be preceded by a step of making the injection opening 13 if the latter is not already present in the capsule 2 or it was not created before starting the method for making the beverage.
  • the method comprises, during the step of making the outfeed opening 15 in the bottom wall 5, creating a linear cut 22 extending between two ends which are separate and apart, the linear cut having a concave side 27 and a convex side 28, therefore the linear cut 22 not being straight.
  • the linear cut 22 delimiting a portion of the bottom wall 5 which constitutes at least one tab 29 made of plastic material which is flexible towards the outside of the capsule 2 relative to the rest of the bottom wall 5 and which comprises a perimetric edge 30.
  • the perimetric edge 30 is constituted of the face of the tab 29 which corresponds to the thickness of the bottom wall 5 and which is usually facing towards the linear cut 22.
  • the tab 29 of material is elastically flexible towards the outside.
  • the method comprises, after the step of making the outfeed opening 15, the operating step of coupling to the perimetric edge 30 of the tab 29, a concave surface (the concave inner surface 25 in the case of the apparatus 1 described above) with suitable shape and positioning.
  • the concave surface must extend parallel to an axis of extension and must have a shape such that the projections, parallel to the axis of extension, of all of its cross-sections obtainable in planes perpendicular to the axis of extension, are substantially shaped to match the perimetric edge 30 and all lie on the same line.
  • the definition "shaped to match the perimetric edge 30" in the context of this invention means either that they substantially have the same shape and size so that it is possible to rest the perimetric edge 30 on the concave surface, or that they substantially have the same shape and a slightly different size.
  • the size of the perimetric edge 30 is slightly greater than said line on which the projections of the cross-sections lie (by several tenths of a millimetre), in such a way that the perimetric edge 30 can rest on the concave inner surface 25 only after a small deformation of the tab 29 towards the inside of the capsule 2.
  • the axis of extension must be positioned substantially perpendicular to the bottom wall 5 (perpendicularity assessed at the linear cut 22). Moreover, in this way, advantageously the line on which all of the projections of the cross-sections of the concave surface substantially lie substantially coincides with, or is alongside and substantially parallel to, the projection, parallel to the axis of extension, of the perimetric edge 30.
  • the above is achieved thanks to use of the piercing element 18 both to make the linear cut 22 and to position the concave surface facing the perimetric edge 30.
  • the piercing element 18 is kept in position through the bottom wall 5 in order to perform the step of coupling the concave surface (in this specific case, the concave inner surface 25) to the perimetric edge 30.
  • the step of coupling the concave surface to the perimetric edge 30 is carried out by positioning the axis of extension substantially horizontally and positioning the concave surface with its concavity facing upwards.
  • the method according to this invention comprises, at least during an initial part of the injecting step, the concave surface and the perimetric edge 30 coupled to it interacting to prevent or at least hinder the flow of the beverage between them towards the outside of the capsule 2.
  • the method advantageously comprises the creation of a watertight seal between the concave surface and the convex side 28 of the linear cut 22 for substantially preventing the beverage from flowing between them towards the outside of the capsule 2.
  • the watertight seal between the concave surface and the convex side 28 of the linear cut 22 is obtained both thanks to the convex shape of the convex side 28 corresponding to a portion of the bottom wall 5 which is more difficult to bend, and thanks to the fact that the operating portion 23 of the piercing element 18 has a thickness which increases outwards going away from the top edge 20, which causes almost a joint between the operating portion 23 and the bottom wall 5 of the capsule 2 at the convex side 28 of the linear cut 22.
  • the bending of the tab 29 is elastic, so that the tab bends outwards to the extent that a new equilibrium is established between the elastic resistance to bending offered by the material of which the tab 29 is constituted and the force applied to the tab 29 by the overpressure present inside the capsule 2.
  • the elastic properties of the tab therefore cause a reduction in its bending, thereby reducing the size of the transit gap 31 .
  • the reduction of the transit gap 31 in turn causes a reduction of the flow of beverage coming out, with a consequent new increase in the internal pressure which restarts the sequence of steps just described.
  • the step of making the outfeed opening 15 may be carried out either before the step of injecting the hot water or during the step of injecting the hot water, using the pressure inside the capsule 2 to cause a swelling of the bottom wall 5 and its tearing (for example against a piercing element 18 positioned in such a way that it cannot pierce the bottom wall 5 at the moment when the unit is closed), or partly before the injecting step and partly during the injecting step.
  • This invention brings important advantages.
  • the apparatus and the method according to this invention on one hand allow tiny air bubbles to be incorporated in the beverage, obtaining a thick, dense surface layer of foam, and on the other hand allow the beverage to be supplied with a suitable overpressure inside the capsule, therefore achieving suitable pre-infusion of the powdered substance.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Food Science & Technology (AREA)
  • Apparatus For Making Beverages (AREA)

Abstract

L'invention concerne un appareil qui comprend au moins un élément de perçage (18) ayant un axe d'extension qui est sensiblement perpendiculaire à la paroi inférieure (5) de la capsule (2) utilisée, un bord de coupe (21) transversal à l'axe d'extension et conçu pour créer une découpe linéaire (22), et une partie fonctionnelle (23) qui forme un canal d'écoulement (24) avec une surface interne concave (25), qui s'étend sensiblement parallèlement à l'axe d'extension et est conçu de telle sorte que les saillies parallèles à l'axe d'extension de toute ses sections transversales formées dans des plans perpendiculaires à l'axe d'extension reposent sensiblement sur la même ligne. Selon le procédé, une découpe linéaire (22) est réalisée dans la paroi inférieure (5), ladite découpe délimitant une languette (29) faite de matière plastique qui est flexible vers l'extérieur de la capsule (2) par rapport au reste de la paroi inférieure (5) et qui comprend un bord périmétrique (30) ; ce dernier est accouplé à une surface concave du type indiqué ci-dessus ; au début de l'injection d'eau dans la capsule (2), la surface concave et le bord périmétrique (30) interagissent pour empêcher ou au moins gêner l'écoulement de la boisson entre eux vers l'extérieur de la capsule (2) tandis que, lorsqu'une valeur de pression prédéterminée est atteinte à l'intérieur de la capsule (2), la languette (29) se plie vers l'extérieur, créant un espace de passage (31) pour la boisson.
PCT/IB2014/067314 2014-04-23 2014-12-24 Appareil et procédé de fabrication de boisson à l'aide d'une substance alimentaire en poudre contenue dans une capsule WO2015162468A1 (fr)

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ITVR20140101 2014-04-23
ITVR2014A000101 2014-04-23

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Cited By (1)

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WO2021061615A1 (fr) * 2019-09-25 2021-04-01 Keurig Green Mountain, Inc. Chambre d'ingrédient de boisson de machine à infuser

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021061615A1 (fr) * 2019-09-25 2021-04-01 Keurig Green Mountain, Inc. Chambre d'ingrédient de boisson de machine à infuser
CN114521117A (zh) * 2019-09-25 2022-05-20 库里格绿山股份有限公司 冲泡机饮料原料腔

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